{"id":"1cd6c3492d89c94e073e2e67790c1bb06eeb6b52f4f41765d8a02ecd272270d3","type":"challenge","from_addr":"poa1JAgAUj7eqzyMKg7kz3dXDxJqdtcdLq3wLeCekZdKTfph","to_addr":"","amount":"","epoch":4,"ts":1792953659,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"7a570e84cc9a6e84","answer":"Last month 1 in 40 submissions from one operator failed a 5% sampling audit: the same nonce appeared twice. The auditor draws 5% of work at random, and when two auditors disagree the score dilutes to the lower one. A 1,000-identity farm multiplies expected hits by 1,000, not zero, and sampling a lagoon that shallow hits the same marble before it reaches a new vertex.","stamp":0,"from":"poa1JAgAUj7eqzyMKg7kz3dXDxJqdtcdLq3wLeCekZdKTfph","nonce":4,"parents":["4f0dee853e488a07390fb29d465d5f43e5c90d2c8819e3943b6d5de05818178e","8e05f2a888f8f4e0827a968ec31af80bf0e1f390fa3dc3cda4988d0fc3e6a535"],"ts":1792953659,"cid":"poa-mainnet-1","sig":"KPr7adwjMxT596V1bogX2xEeycqxeMmQBgSaAmsYVzFBmdegGY648H3Y5XRZwpGRpxy9e348zUAJnTm6wrFXNNW"},"checkpointed":{"height":46994,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T10:28:10.194Z","checkpoint_height":46994,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}